package chapter03;
class  student1 {
    String name;
    void  read () {
        System.out.println("大家好，我是"+name);
    }
}
class Example01 {
    public static void main (String[] args){
        Student stu1 = new Student ();
        Student stu2 = new Student ();
        stu1.name = "小明";
        stu1.read ();
        stu2.name = "小华";
        stu2.read ();
    }
}

// 3-2
class Student2 {
    String name;
    int age;
    void read () {
        System.out.println("大家好，我是"+name+",年龄"+age);
    }
}
class Example02 {
    public static void main (String[] args){
        Student stu1 = new Student ();
        Student stu2 = null;
        stu2 = stu1;
        stu1.name = "小明";
        stu1.age = 20;
        stu2.age = 50;
        stu1.read ();
        stu2.read ();

    }
}